aMedical Oncology Department, Instituto de Investigación Sanitaria San Carlos (IdISSC)

bDepartment of Otolaryngology-Head and Neck Surgery, Instituto de Investigación Sanitaria San Carlos (IdISSC)

cRadiation Oncology Department, Hospital Clínico Universitario San Carlos, Madrid, Spain

dMedical Oncology Department, Aliada Cancer Center, Lima, Perú

eMedical Oncology Department, Clínica San Felipe, Lima, Perú

fMedical Oncology Department, Hospital María Auxiliadora, Lima, Perú

gRadiology Department, Hospital Clínico Universitario San Carlos, Madrid, Spain

hNuclear Medicine Department, Hospital Clínico Universitario San Carlos, Hospital Clínico Universitario San Carlos, Madrid, Spain

iPathology Department, Hospital Clínico Universitario San Carlos, Madrid, Spain

Correspondence to Santiago Cabezas-Camarero, MD, PhD, Head and Neck Cancer, Neuro-Oncology and Genetic Counseling Unit, Medical Oncology Department, Hospital Clínico Universitario San Carlos, Paseo del Profesor, Martín Lagos S/N, 28040 Madrid, Spain Tel: +34 913303000; e-mail: [email protected]